XFlow

Overview

XFlow is a next generation CFD software system from Next Limit Technologies that uses a proprietary, particle-based, meshless approach which can easily handle traditionally complex problems.

For engineers and analysts who require quick and accurate feedback on flow, thermal, and acoustic behaviour, XFlow is a CFD software system that provides you with the ability to solve problems involving moving boundaries, free surface and fluid structure interaction on complex geometric domains.

Key Features

Computational Fluid Dynamics (CFD) technology allows the analysis of flow behavior in virtual environments, lowering costs and times, and thus offering a real alternative to analysis in experimental facilities.

The XFlow approach to CFD analysis enables complex modeling in a straightforward way, minimizing the presence of algorithmic parameters and avoiding the traditionally time consuming meshing process.

Meshless approach

The meshless approach within XFlow is particle-based and fully Lagrangian which means classic fluid domain meshing is not required and surface complexity is not a limiting factor. XFlow can handle moving bodies and deformable parts, and is tolerant with the quality of the input geometry.

Particle-based kinetic solver

XFlow features a novel particle-based kinetic algorithm that resolves the Boltzman and the compressible Navier-Stokes equations. The solver features state-of-the-art LES (Large Eddy Simulation) modelling, and advanced non-equilibrium wall models.

The kinetic approach has been specifically designed to perform very fast with accessible hardware. It provides Large Eddy Simulation (LES) analysis in CPU-times similar to most codes providing just RANS analysis.

Advanced modeling capabilities

XFlow is capable of handling large and complex models, and greatly simplifies the setup of analysis with:

• Moving parts
• Forced or constrained motion
• Contact modeling

Advanced analysis capabilities

XFlow's solver also features:

• Thermal analysis
• Conjugated heat transfer
• Flow through porous media
• Non-Newtonian flows
• Complex boundary conditions including the porous jump and fan models.

Adaptive wake refinement

XFlow's engine automatically adapts the resolved scales to the user's requirements, refining the quality of the solution near the walls and dynamically adapting to the wake while the flow develops.

Single consistent wall model

XFlow uses a unified non-equilibrium wall function to model the boundary layer. This wall model works in all cases, meaning that it is not necessary to select between different algorithms and take care of different limitations related to each scheme.

Near-linear scalable performance

XFlow is fast and efficient, even on a standard desktop PC. High performance computers are not required. XFlow is fully parallelized for multi-core technology with near-linear scalability.

Benefits

For engineers and analysts who require quick and accurate feedback on flow, thermal, and acoustic behaviour, XFlow is a CFD software system that provides you with the ability to solve problems involving moving boundaries, free surface and fluid structure interaction on complex geometric domains.

Improves solution efficiency

XFlow is a next generation CFD software that dramatically improves the ´solution quality vs time-to-solution´ trade-off.

Reduces implementation cost

XFlow utilizes a proprietary particle-based approach to Computational Fluid Dynamics which is extremely easy to set up and use, and which significantly reduces training and support costs.

Reduces hardware requirements

XFlow's innovative approach allows complex problems to be solved on standard modern desktop computers, reducing reliance on large clusters or HPC systems.

Best-in-class technology

XFlow's advanced techniques easily handle traditionally complex problems such as aero-acoustics, moving parts, free surface flows and fluid-structure interaction.

Workflow

XFlow provides a unique and novel interface and working environment for the user (including pre-processor, solver and post-processor fully integrated in the same environment), state-of-the-art visualization, and a configurable layout.

Pre processing

Being particle-based, the algorithms behind XFlow lower the requirements imposed on the CAD models, e.g. for external aerodynamics around fixed parts the software is not concerned with moving or crossing surfaces as soon as these define a coherent fluid volume. Thus the complexity of the model is not a limiting factor in XFlow.

Moreover, the traditionally time consuming meshing process is totally avoided and the software just requires the target scales that the user wants to resolve for the far field, the near shapes or within the wake. Minimizing the algorithmic parameters makes the setup process closer to reality.

Post processing

The post processing capabilities of XFlow allow an interactive visualization for a deep understanding of the results. Users can choose to display:

• Cutting planes
• Volume rendering
• Streamlines
• Ribbons
• Isosurfaces

In addition XFlow provides tools for numerical processing and allows export to third-party applications such as ParaView.

Industries

XFlow is able to solve a wide range of problems involving internal and external flows and it is particularly useful for the computation of transient aerodynamics and problems involving complex geometries and boundary conditions.

• Automotive
• Aeronautics
• Marine
• Civil Engineering
• Energy
• Bioengineering
• Defense
• Manufacturing